conrad@jupiter.ucsc.edu (Al Conrad, x3208) (03/21/91)
When I create two ScrollingLists with OLIT, I find that selecting in
one deselects in the other. Annoying at best. Does anyone know
how to turn this off?
Also, the OL style guide (page 8-1) says that a level 1 implementation
supports exclusive scrolling lists. In fact on, page 8-3 it says that
exclusive scrolling lists are "perhaps the most common". Yet, OLIT
only supports nonexclusive scrolling lists. My stile guide is a
little old (8/31/89). Have things changed?
Thanks!
Al Conrad
PS - I've been using wcl to simultaneoulsy develop both a motif and OLIT
version of my application. Until I got to scrolling lists, it was
pretty even in the pros and cons department. The OL scrolling lists,
however, are very cumbersome compared to motif's.aim@Corp.Sun.COM (Amy) (03/26/91)
>>From owner-openlook@uunet.uu.net Thu Mar 21 07:05:41 1991 >>To: openlook@uunet.UU.NET >>Path: unify!csusac!ucdavis!ucbvax!agate!darkstar!jupiter.ucsc.edu >>Newsgroups: comp.windows.open-look >>Subject: Interaction of two ScrollingLists >>Sender: usenet@darkstar.ucsc.edu >>Organization: University of California, Santa Cruz >>Lines: 18 >> >>When I create two ScrollingLists with OLIT, I find that selecting in >>one deselects in the other. Annoying at best. Does anyone know >>how to turn this off? >> >>Also, the OL style guide (page 8-1) says that a level 1 implementation >>supports exclusive scrolling lists. In fact on, page 8-3 it says that >>exclusive scrolling lists are "perhaps the most common". Yet, OLIT >>only supports nonexclusive scrolling lists. My stile guide is a >>little old (8/31/89). Have things changed? Which version of OLIT are you running? The scrollingList from Release4 of AT&T's OPEN LOOK toolkit does support exclusive scrolling Lists...but as you'll see from the program below, it's up to the programmer to implement this behavior...(by setting/unsetting the "attr" field in the OlListItem structure)....(I agree that.it would be nice if the list handled this for you though.) Regards, Amy Moore aim@sun.com /**********************************************************************/ #include <X11/Intrinsic.h> #include <X11/StringDefs.h> #include <Xol/OpenLook.h> #include <Xol/ScrollingL.h> #include <Xol/Form.h> static char *liststring[] = { "PresidentsDay" , "St.PatricksDay", "Easter", "MemorialDay","4th of July", "LaborDay", "Halloween", "Thanksgiving", "Hanakuh","Christmas","NewYearsEve"}; static char *mnemonic_char[] = {'P','S','E','M','4','L','H','T','a','C','N'}; static OlListToken (*ListAddItem)(); static void (*ListTouchItem)(); static void (*ListViewItem)(); /******************************************************************** * makeCurrentCB: Callback called when the user selects one of the * items in the ScrollingList. Note it is UP TO THE * application to make the item appear "current" * (indented) by setting the attr field in the * OlListItem structure to be OL_LIST_ATTR_CURRENT. * as well as making the previously selected item * no longer appear selected. *******************************************************************/ void makeCurrentCB(w, clientData, callData) Widget w; XtPointer clientData, callData; { OlListItem* new_item = OlListItemPointer(callData); OlListItem* prev_item; OlListToken token = (OlListToken) callData; static OlListToken selectedtoken; if (selectedtoken != token) { printf("Item selected: %s\n", new_item->label); /* * Mark the item as selected or current by setting a bit * in its attribute field. Notify the widget that we have * touched an item. */ new_item->attr |= OL_LIST_ATTR_CURRENT; (*ListTouchItem)(w, token); (*ListViewItem)(w, token); /* * If there was a previously selected item, unselect by * clearing the CURRENT attribute bit. Again, since we have * modified an item, we must notify the widget. */ if (selectedtoken != 0) { prev_item = OlListItemPointer(selectedtoken); prev_item->attr &= ~OL_LIST_ATTR_CURRENT; (*ListTouchItem)(w, selectedtoken); } /* * Keep track of currently selected item in list */ selectedtoken = token; } } /***************************************************************************/ main(argc, argv) int argc; char **argv; { Widget toplevel, form, list; OlListItem *listitem; int i; toplevel = OlInitialize(argv[0], "Test", NULL, 0, &argc, argv); form = XtVaCreateManagedWidget("form", formWidgetClass, toplevel, NULL); /* * Create ScrollingList */ list = XtVaCreateManagedWidget("list", scrollingListWidgetClass, form, XtNviewHeight, (XtArgVal)5, XtNselectable, (XtArgVal)True, NULL); /* * Get routines to manipulate the ScrollingList */ XtVaGetValues(list, XtNapplAddItem, (XtArgVal)&ListAddItem, XtNapplTouchItem, (XtArgVal)&ListTouchItem, XtNapplViewItem, (XtArgVal)&ListViewItem, NULL); /* * Malloc up space for listitem data. */ listitem = (OlListItem *)XtMalloc(XtNumber(liststring)*sizeof(OlListItem)); /* * Create list items one by one and add them to list */ for(i=0; i < XtNumber(liststring) ;i++) { listitem[i].label_type = (OlDefine) OL_STRING; listitem[i].label= XtNewString(liststring[i]); listitem[i].attr = 0; listitem[i].mnemonic = mnemonic_char[i]; (*ListAddItem) (list, NULL, NULL, listitem[i]); } XtAddCallback(list, XtNuserMakeCurrent, makeCurrentCB, NULL); XtRealizeWidget(toplevel); XtMainLoop(); } /********************************END EXAMPLE*******************************/